Séminaire de Mathématique

Ergodicity for Langevin Dynamics with Singular Potentials

by Masha Gordina (University of Connecticut)

Amphithéâtre Léon Motchane (IHES)

Amphithéâtre Léon Motchane


Le Bois Marie 35, route de Chartres 91440 Bures-sur-Yvette

Probability and analysis informal seminar

We discuss Langevin dynamics of N particles on Rd interacting through a singular repulsive potential, such as the Lennard-Jones potential, and show that the system converges to the unique invariant Gibbs measure exponentially fast in a weighted total variation distance.  The proof relies on an explicit construction of a Lyapunov function using a modified Gamma calculus (Bakry-Emery).  In contrast to previous results for such systems, our results imply geometric convergence to equilibrium starting from an essentially optimal family of initial distributions. This is based on joint work with F.Baudoin and D.Herzog.


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Organized by

Thierry Bodineau, Pieter Lammers, Yilin Wang